The report from the independent regulator of health and social care in England, published on Friday, September 5, highlights the strength of the council's Oxfordshire Way vision.
This approach supports people to live well and independently within their communities.
The report also commends the council's positive partnership with the NHS and the voluntary and community sector, which is central to the strategy.
The council's teams were praised for their person-centred approach, focusing on building relationships and trust to better understand residents' needs.
Councillor Tim Bearder, Oxfordshire County Council's cabinet member for adult social care, said: "I'm delighted to confirm our 'good' rating following the CQC inspection and congratulate everyone involved in achieving this positive outcome.
Councillor Tim Bearder (Image: Ed Nix) "The report highlights our clear vision for adult social care in Oxfordshire and the strong partnerships that help us to keep improving services for residents.
"This rating reflects a well-integrated service working at scale with NHS and social care partners.
"I also want to recognise the dedication of our care workers. Their commitment is absolutely central to this rating."
CQC local authority assessments have been a statutory requirement for all councils with a responsibility for adult social care since April 2023, as part of the Care Act 2014.
The inspection took place between Monday, January 13, and Friday, January 17, this year and involved meetings and focus groups with members of the council's adult social care team, councillors, external partners, and people who draw on the service.
The report also highlighted several strengths in the council's service, including a well-managed transition process for young people moving into adulthood, with conversations described as "aspirational and ambitious".
Strong relationships with community and voluntary sector partners, enabling the council to better understand and plan for local needs, were also praised.
Marked improvements in safeguarding were highlighted, with long-standing cases reduced from 286 to just 18 within a year.
The report found effective reablement services, with 77 per cent of people regaining full independence following support, demonstrating strong outcomes in helping residents to recover after hospital discharge.
The latest rating follows the council's children's services also being graded 'good' by Ofsted in April 2024.
Oxfordshire County Council said it remains "firmly committed" to strengthening adult social care, and findings from the recent assessment will play a key role in shaping ongoing improvement plans.
To ensure services are "responsive, inclusive, and continually improving," the council says it will continue working closely with partners, care providers, and the voluntary and community sectors, as well as residents, their families, and carers.